* {
    margin: 0;
    padding: 0;
}

li {
    list-style-type: none;
}

.container {
    width: 300px;
    margin-left: 0px;
    position: relative;
    margin-top: 10px;
}

.small-img {
    width: 300px;
    height: 300px;
}

.small-img img {
    width: 100%;
    height: 100%;
}

.focus {
    width: 200px;
    height: 200px;
    background: #FEDE4F;
    opacity: 0.5;
    position: absolute;
    left: 0;
    top: 0;
    display: none;

}

.big-img {
    position: absolute;
    left: 450px;
    top: 0;
    width: 340px;
    height: 340px;
    overflow: hidden;
    display: none;
}

.big-img img {
    position: absolute;
    left: 0;
    top: 0;
    width: 500px;
    height: 500px;
}

.img-list {
    display: flex;
}